PAEMELIA.] PARMRLIEl. 245 



But. /. c. it evidently orijrinates from the nodular excrescences on the 

 tliallus of the preceding form becoming detached. 



Hab. On the ground in alpino situations. — Distr. Found only on one 

 of the N. Grampians, Scotland. — B, M. : Morrone, Braemar, Aberdeen- 

 shire. 



13. P. Borreri Turn. Trans. Linn. Soc. ix. (1808) p. 148, t. 13. 

 p. 2. — Thallus suborbicular, cartilagineo-membranaceous, appressed, 

 imbricato-lobed, rugoso-sorediate, glaucous-grey or pale whitish- 

 grey ; beneath brownish or pale, sublibrillose, glabrous at the cir- 

 cumference ; lobes broad, rounded, sinuate, the soredia white-punc- 



tiform (K +^'''^^'^,CaCl~ j.g^j, soredia CaCl-(- red). Apothecia 



large, badio-reddish, the margin elevated, inflexed ; spores 0,011- 

 1.5 mm. long, (i,U08-l] mm. thick.— Sm. Eng. Fl. v. p. 19U ; Tavl. 

 in Mack. Fl. Hib. ii. p. 147 ; Mudd, Man. p. 94, t. ii. f. 29 ; Cronib. 

 Lich. Brit. p. 34; Leight. Lich. Fl. p. 133, ed. 3, p. 122. — Lichen 

 Borreri Eng. Bot. t. 1 780. Lichenoides glaucum perlatum, siihtus 

 nifjrum et cirrosum Dill. Muse. 147, t. 20. f. 39 c. Farmelia red- 

 denda Stirt. in Scottish Naturalist, 1878, p. 298 ; Leight. Lich. Fl. 

 ed. 3, p. 199, is an accidental state, in which the medulla (not the 

 soredia) gives no reaction with CaCl (c/V. Cromb. Grevillea, 1881, 

 p. 26). — Brit. Exs. : Leight. n. 231 ; Larb. Caesar, n. 20. 



Similar to P. sulcata, from which it is distinguished by the thicker, 

 more rigid, smoother, less imbricate, appressed, differently coloured 

 thallus, and by the form of the soredia. These appear as numerous, ir- 

 regularly scattered, often impressed and pseudo-cyphelloid, whitish 

 punctate verrucee, giving it a rough aspect. The thalline re ictions, the 

 smaller spores, and the spermogones render it very di>tiuct. In this 

 country the apothecia are rare and chiefly central, becoming irregularly 

 perforate in old age. The spermoorones have the spermatia lageuiform, 

 0,0045 mm. long, 0,0010 mm. thick. 



Hab. On trunks of old trees, rarely on rocks, in maritime and upland 

 wooded districts. — Distr. General in S. and W. England ; rare m S. 

 Scotland, S. and S. W. Ireland, and the Chamiel Islands. — B. M. : Rozel, 

 Island of Jersey ; near Jerhourg, Guernsey. Near Bury, Suffi^lk ; AVal- 

 thamstow, Essex ; Maidstone, Kent ; near Brighton and llenfield, Sussex ; 

 Ryde and Shanklin, Isle of Wight ; Basingstoke and Lyndhurst, Hamp- 

 shire ; near Penzance and Withiel, Cornwall ; Kemble, Gloucestershire ; 

 near Oxford and Charlton Camp, Oxfordshire ; Ilindlip and Malvern, 

 AVorcestershire ; Twycross, Leicestershire ; Harboro' Magna, Warwick- 

 shire ; Barmouth and Dolgelly, Merionethshire ; Dynevor Castle, Car- 

 marthenshire ; near Kendal, Westmoreland. Near Dumfries ; New 

 Galloway, Kirkcudbrightshire. Riverston, co. Cork ; near Limerick ; 

 Dunkerron, co. Kerry. 



b. Ochroleucce. — Thallus normally yellowish green, or pale 

 straw-coloured. 



14. P. caperata Ach. Moth. (1803) p. 216.— Thallus expanded, 

 imbricato-lobed, rugulose, pale yellowish-green or ochroleucous : 



